Example Of Wireless Telegraphy

Likewise, in the case of the wireless telegraphy, the electric energy
produced by the sending instrument is transformed into subtle and finer
etheric waves, which travel to the receiving instrument, and are there
transformed into electric waves, the latter producing physical changes
in the receiving apparatus which enable them to be read by the observer.
In the case of wireless telephony there is still more complex process of
transformation, as follows: the speaker conveys sound vibrations into
the instrument; these are transformed into electric vibrations; and the
latter into the etheric vibrations which travel through space to the
receiver. Reaching the receiver, the etheric vibrations are transformed
into ordinary electric vibrations, and these in turn into sound waves
capable of being sensed by the listener.